diff --git a/build-constraints.yaml b/build-constraints.yaml
index fe4af1a1..c8437ffc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -842,6 +842,7 @@ packages:
         - edit-distance
         - lattices
         - waitra
+        - spdx
 
     "Adam C. Foltzer acfoltzer@galois.com @acfoltzer":
         - cryptol